SOLUTION: Janet, an experienced shipping clerk, can fill a certain order in 6 hours. Tom, a new clerk, needs 7 hours to do the same job. Working together, how long will it take them to fill

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Question 875726: Janet, an experienced shipping clerk, can fill a certain order in 6 hours. Tom, a new clerk, needs 7 hours to do the same job. Working together, how long will it take them to fill the order?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
The rate for both together is the sum of their rates.
1%2F6%2B1%2F7=%287%2B6%29%2F42=13%2F42 orders per hour.

You are asked for how much time for 1 order, which is the reciprocal of the combined rate.